sorry i understand that: what i was trying to say is that the spam fuctionality of roundcube should be basic and spam filtering should be mail server based.
and if there was a 'report as spam' button it should not be training a roundcube based spam filter as this is not a task of mail client.
I can see an issue that if roundcube filterspam from the server that if people login to there mail from a client like outlook they would get the spam(unless roundcube deleted it from the server as well on some kind of cron job?)
the report as spam button was in responce to Prasad007 and flosoft post. The report as spam button is a good idea as my isp uses this and it forwards the spam to an email for people to review and build rules. (this could be done as a skin feature? all it is a forward command with a predefined email).
the spam software i was referring to was something like boxtraper(is that the name) which has a blacklist feature.
"You just have to set a filter rule on your client, which say: All mails containing *****SPAM***** in the header, should be moved to the folder Spam." Is this not already in delevopment(mail rules)? - my server does this automatically so roundcube does not have to it is a standard feature of 'SpamAssassin'.
I hope this explains my previous post.
"yes. Which would teach an own Roundcube Antispam System, or which could teach SpamAssassin" is this a serious comment about round cube antispam system?